EP 2573371 A4 20180228 - NOX SENSOR DIAGNOSING DEVICE AND SCR SYSTEM
Title (en)
NOX SENSOR DIAGNOSING DEVICE AND SCR SYSTEM
Title (de)
DIAGNOSEVORRICHTUNG FÜR EINEN NOX-SENSOR UND SCR-SYSTEM
Title (fr)
DISPOSITIF DE DIAGNOSTIC DE CAPTEUR DE NOX ET SYSTEME DE REDUCTION CATALYTIQUE SELECTIVE (SCR)
Publication
Application
Priority
- JP 2010113751 A 20100517
- JP 2011061224 W 20110516
Abstract (en)
[origin: EP2573371A1] Provided are a NOx sensor diagnosis apparatus capable of diagnosing the appropriateness of a NOx sensor by considering environmental conditions and preventing misdiagnosis, and an SCR system. A NOx sensor diagnose apparatus, which diagnoses a NOx sensor 110 provided in an exhaust pipe 102 of an engine E and configured to detect the concentration of NOx in exhaust gas, includes a calculation value operating unit 2 configured to acquire the calculation value of the concentration of NOx in the exhaust gas based on the actuation state of the engine E, an error determining unit 3 configured to determine that the NOx sensor 110 is erroneous when a difference between the calculation value of the concentration of NOx acquired by the calculation value operating unit 2 and the detection value of the concentration of NOx detected by the NOx sensor 110 is larger than a determination threshold value, and a determination threshold value setting unit 4 configured to set the determination threshold value based on the temperature of the cooling water for cooling the engine E, an atmospheric pressure, and an outdoor temperature.
IPC 8 full level
F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 11/00 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02D 45/00 (2006.01)
CPC (source: EP US)
F01N 3/208 (2013.01 - EP US); F01N 11/00 (2013.01 - EP US); F02D 41/222 (2013.01 - EP US); F01N 2560/026 (2013.01 - EP US); F01N 2610/02 (2013.01 - EP US); F01N 2900/14 (2013.01 - EP US); F02D 41/146 (2013.01 - EP US); F02D 2041/228 (2013.01 - EP US); F02D 2200/021 (2013.01 - EP US); F02D 2200/0414 (2013.01 - EP US); F02D 2200/703 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US); Y02T 10/40 (2013.01 - EP US)
Citation (search report)
- [I] US 2005103000 A1 20050519 - NIEUWSTADT MICHIEL V [US], et al
- [Y] JP 2008215213 A 20080918 - TOYOTA MOTOR CORP & US 2010095933 A1 20100422 - MORIYA HIDENORI [JP], et al
- [Y] JP 2002106327 A 20020410 - NISSAN MOTOR
- [A] US 2009229356 A1 20090917 - KARIYA YASUHIRO [JP], et al
- [AD] JP 2009128237 A 20090611 - DENSO CORP
- See references of WO 2011145574A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2573371 A1 20130327; EP 2573371 A4 20180228; EP 2573371 B1 20200226; CN 102893004 A 20130123; CN 102893004 B 20160824; JP 2011241737 A 20111201; JP 5533235 B2 20140625; US 2013060486 A1 20130307; US 9145842 B2 20150929; WO 2011145574 A1 20111124
DOCDB simple family (application)
EP 11783508 A 20110516; CN 201180024429 A 20110516; JP 2010113751 A 20100517; JP 2011061224 W 20110516; US 201113698189 A 20110516